Automated method and system for self-calibration of image on media sheets using an auto duplex media path

Abstract

Automated image on media registration and self-calibration using a built-in printing system duplex media path is enabled. The media sheet can be registered in a registration system and a calibration image can be placed on the media sheet after registration of the media. The media sheet can be inverted in the duplex media path and re-fed for detection of calibration image placement accuracy on the media sheet. The registration system can transmit the image registration placement data to a printer controller. Thereafter, the printer controller can adjust system settings to compensate for an image placement registration offset using a calibration algorithm. The invention enables system adjustments without requiring manual measurements or media transfer to an independent scanning device or adding complexity to printing systems.

Description

TECHNICAL FIELD[0001]Embodiments are generally related to digital printing systems. Embodiments are more particularly related to an automated method and system for registration self-calibration of image on media sheets using an auto duplex media path. Embodiments are additionally related to registration systems with a calibration algorithm.BACKGROUND OF THE INVENTION[0002]In printing industries, images on media such as paper in digital printing systems can require adherence to stringent quality standards. Quality of such images on the media should be maintained throughout printing, finishing and binding processes. The media should correctly be positioned before applying the image. Therefore, many printers contain active registration systems that correctly position and orient media prior to applying images to it. The purpose of the active registration systems is to properly register sheets of paper, transparency, card stock or other media. For example, a sheet of paper can be registe...

AI Technical Summary

Benefits of technology

[0009]It is another aspect of the present invention to provide a self calibration algorithm using data from the registration system based on the relationship of a calibration image and media edges to provide offset correction values to achieve improved image to media placement registration.

[0012]The registration system determines media orientation and media path position based on sensors that detect the media so the paper path transport and guide elements can be utilized to influence media trajectory, positioning and phasing for proper registration of the media before application of the image. The term registration system encompasses sensors and the whole media sensing system as well as transport elements and / or guides that can be controlled to influence media position and / or orientation. A calibration value can be used to adjust the data available from the registration system to correct for system errors or offsets, thereby improving media registration to image placement accuracy. The system can utilize the registration system and the duplex media path in order to automatically self-calibrate registration for image placement on the media sheets without intervention from the operator or adding additional sensors.

Problems solved by technology

The above-mentioned methods can add user complexity or production cost to a printer due to the necessity of scanner interaction or the additional sensors.

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